I have no honest clue on the old cooper AT3's as to the NEW Coopper AT3 XL's
but having gone from old to new model, I can tell you the new XL's ride smoother
I cannot say on wear, my old AT3;s barely got me 26,000 miles and were GONE< so, I am hoping the enw one's do WAY better
and YES, they did get pro rated on warranty gave me a discount on the XL"s, or honestly I might have gone to another brand tire all together, as the old AT3's were poor lived tires for me! got more out of the factory Firestones and I thought they sucked for wear!
and as of right now, my XL's 2000 miles or so on them, and I have a BAD vibration, that just started, having to take em back to get re balanced come Monday or when they can get me in>
so, riding smoother great, vibration BAD HAHA!
I am HOPING They make it to 36-40k, on mileage which is about my average on other brands!
never got much more, , it amazes me how so many get so much more than I do
must have gone thru 60+ sets of tires and NONE lasted much longer than 40 k for me? and I DON"T drive like a wild man, all the more so these days more like a old fart! and getting the worse mileage now than when I was younger and maybe had a heavier foot! rotate, stay on top of air, and still poor life on tires here!